20132918509 has 8 divisors (see below), whose sum is σ = 22918105152. Its totient is φ = 17506885440.

The previous prime is 20132918479. The next prime is 20132918537. The reversal of 20132918509 is 90581923102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20132918509 - 2¹⁹ = 20132394221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20132918539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39788124 + ... + 39788629.

It is an arithmetic number, because the mean of its divisors is an integer number (2864763144).

Almost surely, 2^20132918509 is an apocalyptic number.

It is an amenable number.

20132918509 is a deficient number, since it is larger than the sum of its proper divisors (2785186643).

20132918509 is a wasteful number, since it uses less digits than its factorization.

20132918509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79576787.

The product of its (nonzero) digits is 38880, while the sum is 40.

The spelling of 20132918509 in words is "twenty billion, one hundred thirty-two million, nine hundred eighteen thousand, five hundred nine".